Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 5
सिद्धचारणगन्धर्वैर्विद्याधरमहोरगै: ।किन्नरैरप्सरोभिश्च क्रीडद्भिर्जुष्टकन्दर: ॥ ५ ॥
siddha-cāraṇa-gandharvairvidyādhara-mahoragaiḥkinnarair apsarobhiś cakrīḍadbhir juṣṭa-kandaraḥ
The inhabitants of the higher planets — the Siddhas, Cāraṇas, Gandharvas, Vidyādharas, serpents, Kinnaras and Apsarās — go to that mountain to sport. Thus all the caves of the mountain are full of these denizens of the heavenly planets.
As ordinary men may play in the salty ocean, the inhabitants of the higher planetary systems go to the Ocean of Milk. They float in the Ocean of Milk and also enjoy various sports within the caves of Trikūṭa Mountain.